@article{DE_1992_28_10_a21,
     author = {V. F. Apel'tsin},
     title = {Letter to the editors: {{\textquotedblleft}Analytic} continuations of solutions of boundary value problems for the stationary wave equation{\textquotedblright} {[Differentsial'nye} {Uravneniya} 27 (1991), no. 1, 8{\textendash}17, 179; {MR1133505]}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1836},
     year = {1992},
     volume = {28},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_10_a21/}
}